Add py.test wizardry for running a subset of file tests. Fixes #134.

1 files changed, 16 insertions, 0 deletions

diff --git a/conftest.py b/conftest.py
new file mode 100644
index 0000000..01b04d1
--- /dev/null
+++ b/conftest.py
@@ -0,0 +1,16 @@
+"""py.test plugin configuration."""
+
+def pytest_addoption(parser):
+    """Add an option for filtering the file tests run.
+
+    This has to be done in the project root; py.test doesn't (and can't)
+    recursively look for conftest.py files until after it's parsed the command
+    line.
+    """
+    parser.addoption('--test-file-filter',
+        help='comma-separated regexes to select test files',
+        action='store',
+        type='string',
+        dest='test_file_filter',
+        default=None,
+    )